Identify oscillator waveforms, low-pass cutoff frequencies, and filter types by ear. Every sound is generated in your browser, and every answer explains the audible clue behind the control.
Choose a mode, then start when you are ready.
Press “New sound” to begin the listening drill.
Waveform identity comes from harmonic content. A sine wave has only the fundamental. Triangle and square waves add odd harmonics in different strengths. A sawtooth adds both even and odd harmonics, making it the brightest basic oscillator.
A low-pass filter removes brightness above its cutoff. A high-pass removes weight below it. Band-pass keeps a focused middle region, while notch removes a narrow band and can sound hollow or phase-like.
Cutoff tells you where the filtering happens. Resonance emphasizes the area around that point. Learn cutoff first, then listen for resonance as a whistle, peak, or ringing emphasis near the filter edge.
Pair this drill with frequency and EQ ear training to recognize the same frequency ranges in broader audio material.
| What you hear | Common control | What to try |
|---|---|---|
| Pure to harmonically rich | Oscillator shape or wavetable position | Compare sine, triangle, square, and saw at the same pitch and volume. |
| Darker or brighter | Filter frequency / cutoff | Move a low-pass cutoff slowly while holding a sawtooth note. |
| Whistle or emphasis at the edge | Resonance / Q | Raise resonance, then sweep cutoff to hear the emphasized frequency move. |
| Thin, focused, or hollow | Filter type | Switch between low-pass, high-pass, band-pass, and notch without changing the source. |
| Timbre changes over time | Filter envelope or modulation amount | Route an envelope or LFO to cutoff after the static filter shapes are familiar. |
In Ableton Live instruments, the names vary slightly but the listening model stays consistent. Analog uses oscillator Shape plus filter Freq and Reso controls; Drift exposes waveform selection plus low-pass Freq and Res; Wavetable pairs its oscillator tables with filter Frequency and Resonance. See Ableton’s Live Instrument Reference for the current device controls.
Use short sessions of ten questions. Keep the volume comfortable, replay freely, and say what changed before choosing an answer. After each reveal, reproduce the sound on a synth you know. That extra step turns a quiz result into a usable sound-design skill.
For a broader routine, visit the ear training hub for interval, chord, scale, pitch, tuning, and production exercises.